Microservices CI/CD and Deployment Strategies Questions and Answers

Question 1

A team wants to deploy a new version of its 'Checkout' microservice with zero downtime.
Their strategy involves setting up a complete, identical production environment ('Green') with the new version.
After running smoke tests on the 'Green' environment, they instantly switch the load balancer to direct 100% of live traffic from the old environment ('Blue') to the new one.
What is this deployment strategy called?

Accepted Answer

Blue-Green Deployment

Answer

Canary Release

Answer

Rolling Deployment

Answer

A/B Testing

Question 2

What is the primary advantage of using a Canary Release strategy when deploying a new version of a microservice?

Accepted Answer

It allows for testing the new version with a small subset of live production traffic to minimize the impact of potential bugs.

Answer

It updates all service instances simultaneously for the fastest possible deployment.

Answer

It requires maintaining two full production environments, increasing infrastructure cost.

Answer

It simplifies the CI/CD pipeline by eliminating the need for integration testing.

Question 3

Which of the following best describes the principle of "Immutable Infrastructure" in a CI/CD pipeline for microservices?

Accepted Answer

Creating a new server or container with the updated service for every deployment and replacing the old one.

Answer

Modifying existing running server configurations in-place to apply updates and patches.

Answer

Storing all infrastructure configurations in a version control system like Git.

Answer

Using a single, long-running server that is backed up before each deployment.

Question 4

A development team's pipeline automatically builds and tests every code commit. If all tests pass, the artifact is automatically deployed to a staging environment. However, the final deployment to the production environment requires a manual 'Go' decision from a project manager. Which practice does this scenario accurately describe?

Accepted Answer

Continuous Delivery

Answer

Continuous Integration

Answer

Continuous Deployment

Answer

Ad-hoc Deployment

Question 5

A team wants to test a new, resource-intensive version of a 'Recommendation' microservice with real production traffic to check for performance issues, but without affecting any user-facing responses. They configure their infrastructure to duplicate incoming production requests, sending one to the current service and a copy to the new version. The response from the new version is logged for analysis and then discarded. What is this deployment strategy called?

Accepted Answer

Shadow Deployment

Answer

Blue-Green Deployment

Answer

A/B Testing

Answer

Canary Release

Question 6

In a mature CI/CD environment for microservices, which of the following is a primary responsibility of the Continuous Integration (CI) pipeline for an individual service?

Accepted Answer

Compiling code, running unit and contract tests, and publishing a versioned, deployable artifact like a container image.

Answer

Orchestrating the deployment order of multiple interdependent microservices.

Answer

Automatically rolling back a failed deployment in the production environment.

Answer

Provisioning and configuring the underlying Kubernetes cluster infrastructure.